userns: Convert stat to return values mapped from kuids and kgids

- Store uids and gids with kuid_t and kgid_t in struct kstat
- Convert uid and gids to userspace usable values with
  from_kuid and from_kgid

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/stat.h b/include/linux/stat.h
index 611c398dab72..46132409a3f7 100644
--- a/include/linux/stat.h
+++ b/include/linux/stat.h
@@ -58,14 +58,15 @@
 
 #include <linux/types.h>
 #include <linux/time.h>
+#include <linux/uidgid.h>
 
 struct kstat {
         u64             ino;
         dev_t           dev;
         umode_t         mode;
         unsigned int    nlink;
-        uid_t           uid;
-        gid_t           gid;
+        kuid_t          uid;
+        kgid_t          gid;
         dev_t           rdev;
         loff_t          size;
         struct timespec  atime;